An antenna unit and a communication device

Abstract

The embodiment of the application relates to the technical field of antennas, and discloses an antenna unit and communication equipment, the antenna unit comprises a first metal layer, a first substrate, a second metal layer, a second substrate, a third metal layer, a third substrate, a fourth metal layer, a fourth substrate and a fifth metal layer which are sequentially stacked from top to bottom. In the above manner, the embodiment of the application can realize more accurate impedance matching and phase control of the antenna unit, and thus the antenna unit can effectively suppress the coupling between different polarization components, thereby realizing a wide axial ratio bandwidth.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of antennas, and particularly relate to an antenna unit and a communication device. BACKGROUND

[0002] A dual circularly polarized antenna is an antenna capable of transmitting and receiving two mutually orthogonal circularly polarized waves at the same time, compared with a traditional linearly polarized antenna, the dual circularly polarized antenna has a small appearance, light weight, easy to manufacture and can effectively improve the problems of multipath distortion and polarization mismatch.

[0003] In the process of implementing the embodiments of the present application, the inventor found that: at present, there is a mutual coupling effect between the radiation units in the dual circularly polarized antenna, that is, the electromagnetic change of one radiation unit will affect the electromagnetic distribution of another radiation unit, the mutual coupling effect will cause the polarization direction of the antenna to deviate, resulting in the deterioration of the axial ratio, thereby limiting the axial ratio bandwidth. SUMMARY

[0004] The technical problem solved by the embodiments of the present application is to provide an antenna unit capable of realizing a wide axial ratio bandwidth.

[0005] To solve the above technical problems, an embodiment of the present application adopts one technical solution: an antenna unit is provided, comprising a first metal layer, a first substrate, a second metal layer, a second substrate, a third metal layer, a third substrate, a fourth metal layer, a fourth substrate and a fifth metal layer which are sequentially stacked from top to bottom, the first metal layer comprises a first radiation patch, a second radiation patch and a first metal ground assembly, a first microstrip line is provided with a first feeding point, the first radiation patch and the second radiation patch are symmetrically arranged in a first direction about the first microstrip line, and the first substrate is provided with a second metal ground assembly and a first feeding hole assembly; the second metal layer comprises a third radiation patch, a fourth radiation patch, a second microstrip line and a third metal ground assembly, the second microstrip line has a second feeding point, the third radiation patch and the fourth radiation patch are symmetrically arranged in a second direction about the second microstrip line; the second substrate is provided with a fourth metal ground assembly and a second feeding hole assembly, the fourth metal ground assembly is symmetric about the center point of the first microstrip line and the second microstrip line projected on the second substrate; the third metal layer has a fifth metal ground assembly, the fifth metal ground hole assembly is symmetric about the center point of the first microstrip line and the second microstrip line projected on the third metal layer; the third substrate is provided with a sixth metal ground assembly; the fourth metal layer is connected with the third metal layer, the third substrate, the fourth substrate and the fifth metal layer to form a first antenna and a second antenna respectively; the fourth substrate is provided with a seventh metal ground assembly; the three metal columns are ground holes, the two metal columns are the third feeding hole and the fourth feeding hole; the first metal layer, the first substrate, the second metal layer, the second substrate, the third metal layer, the third substrate, the fourth metal layer, the fourth substrate and the fifth metal layer are sequentially stacked from top to bottom.

[0006] Optionally, the fourth metal layer is provided with a third feeding point, a fourth feeding point, a fifth feeding point and a sixth feeding point; the fifth feeding point and the sixth feeding point are connected with an external signal source through the third feeding hole and the fourth feeding hole respectively; the third feeding point and the fourth feeding point are connected with the first feeding point and the second feeding point through the first feeding hole and the second feeding hole respectively to transmit signals to the first radiation patch, the second radiation patch, the third radiation patch and the fourth radiation patch.

[0007] Optionally, the third metal layer, the fourth metal layer and the fifth metal layer are electrically connected through the fifth metal ground assembly, the sixth metal ground assembly and the seventh metal ground assembly respectively.

[0008] Optionally, the first radiation patch comprises a first rectangular radiator and a first trapezoidal radiator, the second radiation patch comprises a second rectangular radiator and a second trapezoidal radiator, the first microstrip line comprises a first feeding line and a first circular feeding patch, the first rectangular radiator and the first trapezoidal radiator are connected, the second rectangular radiator and the second trapezoidal radiator are connected, one end of the first feeding line and the first circular feeding patch are connected, and the first trapezoidal radiator and the second trapezoidal radiator are symmetrically arranged about the first feeding line in a first direction.

[0009] Optionally, the first metal ground assembly comprises a first ground hole, a second ground hole, a third ground hole and a fourth ground hole, the first ground hole and the second ground hole are arranged on the first radiation patch, the third ground hole and the fourth ground hole are arranged on the second radiation patch, and the first ground hole and the third ground hole are symmetrically arranged about the first microstrip line in a first direction, and the second ground hole and the fourth ground hole are symmetrically arranged about the first microstrip line in the first direction.

[0010] Optionally, the third radiation patch comprises a third rectangular radiator and a third trapezoidal radiator, the fourth radiation patch comprises a fourth rectangular radiator and a fourth trapezoidal radiator, the second microstrip line comprises a second feeding line and a second circular feeding patch, the third rectangular radiator and the third trapezoidal radiator are connected, the fourth rectangular radiator and the fourth trapezoidal radiator are connected, one end of the second feeding line and the second circular feeding patch are connected, and the third trapezoidal radiator and the fourth trapezoidal radiator are symmetrically arranged about the second feeding line in a second direction.

[0011] Optionally, the third metal ground assembly comprises a sixth ground hole, a seventh ground hole, an eighth ground hole and a ninth ground hole, the sixth ground hole and the seventh ground hole are arranged on the third radiation patch, the eighth ground hole and the ninth ground hole are arranged on the fourth radiation patch, and the eighth ground hole and the ninth ground hole are symmetrically arranged about the second microstrip line in a second direction, and the eighth ground hole and the ninth ground hole are symmetrically arranged about the second microstrip line in the second direction.

[0012] Optionally, the first feeding hole assembly is symmetrically arranged about the second microstrip line in a second direction.

[0013] Optionally, the first microstrip line and the second microstrip line are the same in shape and size.

[0014] To solve the above technical problems, another technical scheme adopted by the embodiments of the present application is to provide a communication device comprising the above-mentioned any one antenna unit.

[0015] The embodiment of the present application provides an antenna unit, which comprises a first metal layer, a first substrate, a second metal layer, a second substrate, a third metal layer, a third substrate, a fourth metal layer, a fourth substrate and a fifth metal layer which are sequentially stacked from top to bottom. In the above manner, more accurate impedance matching and axial ratio control of the antenna unit can be realized, and by arranging a wideband amplitude equalization and phase difference 90-degree feeding network layer and a plurality of symmetrical metal grounding hole assemblies on the metal layer and the substrate, the antenna can realize wide impedance bandwidth and wide axial ratio bandwidth. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the specific embodiments or prior art description will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual proportion.

[0017] Figure 1 is an exploded view of the antenna unit of the embodiment of the present application;

[0018] Figure 2 is a partial structure schematic diagram of the antenna unit of the embodiment of the present application;

[0019] Figure 3 is another partial structure schematic diagram of the antenna unit of the embodiment of the present application;

[0020] Figure 4 is still another partial structure schematic diagram of the antenna unit of the embodiment of the present application;

[0021] Figure 5 is another partial structure schematic diagram of the antenna unit of the embodiment of the present application;

[0022] Figure 6 is a simulation result diagram of the reflection coefficient of the antenna unit of the embodiment of the present application;

[0023] Figure 7 is a simulation result diagram of the axial ratio of the antenna unit of the embodiment of the present application;

[0024] Figure 8 is a simulation result of the maximum gain of the antenna unit of the embodiment of the present application;

[0025] Figure 9 is a simulation result diagram of the radiation efficiency of the antenna unit of the embodiment of the present application. DETAILED DESCRIPTION

[0026] For the purpose of understanding the present application, the present application will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. It needs to be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or one or more intervening elements can be present therebetween. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or one or more intervening elements can be present therebetween. The terms "upper", "lower", "inner", "outer", "vertical", "horizontal", and the like as used in this specification are intended to indicate the orientation or positional relationship as shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance.

[0027] Unless otherwise defined, all technical and scientific terms used in the present specification are intended to have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used in the present specification includes any and all combinations of one or more of the associated listed items.

[0028] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as there is no conflict.

[0029] Please refer to Figure 1 , Figure 2 and Figure 3The antenna unit 100 comprises a first substrate 10, a first metal layer 20, a second metal layer 30, a second substrate 40, a third metal layer 50, a third substrate 60, a fourth metal layer 70, a fourth substrate 80 and a fifth metal layer 90; the first metal layer 20 comprises a first radiation patch 11, a second radiation patch 12 and a first metal ground assembly 101, the first microstrip line 13 is provided with a first feeding point (not shown in the figure), the first radiation patch 11 and the second radiation patch 12 are symmetrically arranged in a first direction about the first microstrip line 13, and the first metal ground assembly 101 is symmetrically arranged in the first direction about the first microstrip line 13; the first substrate 10 is provided with a second metal ground assembly 201 and a first feeding hole assembly (not shown in the figure), the second metal layer 30 comprises a third radiation patch 31, a fourth radiation patch 32, a second microstrip line 33 and a third metal ground assembly 301, the second microstrip line 33 has a second feeding point (not shown in the figure), the third radiation patch 31 and the fourth radiation patch 32 are symmetrically arranged in a second direction about the second microstrip line 33, the second substrate 40 is provided with a fourth metal ground assembly (not shown in the figure) and a second feeding hole assembly (not shown in the figure), the fourth metal ground assembly is symmetric about the center point of the first microstrip line 13 and the second microstrip line 33 projected on the second substrate 40, the third metal layer 50 has a fifth metal ground assembly (not shown in the figure), the fifth metal ground hole assembly is symmetric about the center point of the first microstrip line 13 and the second microstrip line 33 projected on the third metal layer 50, the fourth metal layer 70 is connected with the third metal layer 50, the third substrate 60, the fourth substrate 80 and the fifth metal layer 90, respectively forming a first antenna and a second antenna, and the above-mentioned arrangement helps to eliminate or reduce the resonant frequency caused by structural asymmetry, thereby realizing a wider bandwidth; the second metal ground assembly 201 is symmetrically arranged in the second direction about the second microstrip line 33, and the symmetric structure can balance the current distribution, reduce reflection, improve the impedance matching of the antenna and reduce the standing wave ratio; the second substrate 40 is provided with a fourth metal ground assembly (not shown in the figure), wherein the first substrate 10, the first metal layer 20, the second metal layer 30, the second substrate 40, the third metal layer 50, the third substrate 60, the fourth metal layer 70, the fourth substrate 80 and the fifth metal layer 90 are sequentially stacked from top to bottom, forming a broadband stripline 90° phase shift network, which can provide the first radiation patch 11 and the third radiation patch 31 with broadband signals with equal amplitude and a phase difference of 90°, forming a wide axial ratio right polarized antenna; or, the second radiation patch 12 and the fourth radiation patch 32 can be provided with broadband signals with equal amplitude and a phase difference of 90°, forming a wide axial ratio left polarized antenna.The above setting constitutes a wide axial ratio dual circularly polarized antenna, that is, the antenna unit 100 itself, wherein the first metal layer 20 and the second metal layer 30 serve as radiation layers for transmitting and receiving electromagnetic wave signals; the first substrate 10 and the second substrate 40 serve as dielectric layers for isolating and supporting the metal layers and providing a certain dielectric constant to affect the impedance matching and radiation characteristics of the antenna unit 100; the third metal layer 50 and the fifth metal layer 90 serve as metal ground layers for providing a reference plane to affect the radiation pattern and impedance matching of the antenna unit 100, and the fourth metal layer 70 is used to connect the feed port and the radiation layer to realize signal transmission from the feed port to the radiation layer. Through the above setting, more accurate impedance matching and phase control are realized, thereby realizing wideband characteristics.

[0030] Please refer to Figure 2 In the embodiment of the present application, the fourth metal layer 70 is also provided with an output port 791, an input port 792, a first signal feed point 171 and a second signal feed point 172. The input port 792 is electrically connected with the first microstrip line 13 and the first signal feed point 171 respectively, receives the signal of the first signal feed point 171, and outputs the signal after 90° phase shift. The output port 791 is electrically connected with the second microstrip line 33 and the second signal feed point 172 respectively, receives the signal of the second signal feed point 172, and outputs the signal after 90° phase shift. Through the above setting, the wideband characteristics of the phase shift network are ensured, thereby realizing a wide axial ratio bandwidth.

[0031] The fourth metal layer 70 further comprises a sixth metal ground assembly (not shown in the figure), and the third substrate 60 further comprises a seventh metal ground assembly. The sixth metal aperture assembly is in communication with the fifth metal ground hole assembly and the seventh metal ground hole assembly respectively. The third substrate 60 is electrically connected with the fourth metal layer 70 through the seventh metal ground hole assembly to realize signal transmission.

[0032] In the embodiment of the present application, a first signal feed point is arranged on the first microstrip line 13, the first substrate 10, the second substrate 40, the third substrate 60 and the fourth metal layer 70, indicating the transmission path of the signal from the fourth metal layer 70 to the first metal layer 20. A second signal feed point is arranged on the second microstrip line 33, the second substrate 40, the third substrate 60, the fourth metal layer 70, indicating the transmission path of the signal from the fourth metal layer 70 to the second metal layer 30.

[0033] In the embodiment of the present application, the fourth metal layer 70, the fourth substrate 80 and the fifth metal layer 90 are all provided with an output port and an input port, indicating the transmission path of the signal from the output port and the input port to the fourth metal layer 70.

[0034] Please refer to Figure 3 and Figure 4 , the first radiation patch 11 includes a first rectangular radiator 111 and a first trapezoidal radiator 112, the second radiation patch 12 includes a second rectangular radiator 121 and a second trapezoidal radiator 122, the first microstrip line 13 includes a first feed line 131 and a first circular feed patch 132, the first rectangular radiator 111 and the first trapezoidal radiator 112 are connected, the second rectangular radiator 121 and the second trapezoidal radiator 122 are connected, to generate a specific current distribution, thereby affecting the radiation characteristics of the antenna unit 100, one end of the first feed line 131 and the first circular feed patch 132 are connected, the first feed line 131 is used to transmit signals to the first radiation patch 11, and the first circular feed patch 132 is used to feed signals to the first feed line 131, the first trapezoidal radiator 112 and the second trapezoidal radiator 122 are symmetrically arranged about the first feed line 131 in a first direction, which can balance the current distribution, reduce reflection, improve impedance matching of the antenna unit 100, reduce the standing wave ratio, and the symmetric structure can ensure the phase difference of left-handed and right-handed circularly polarized waves to be stable, thereby improving the axial ratio bandwidth.

[0035] Please refer to Figure 4 , the first metal ground assembly 101 includes a first ground hole 151, a second ground hole 152, a third ground hole 153, and a fourth ground hole 154, the first ground hole 151 and the second ground hole 152 are arranged on the first radiation patch 11, the third ground hole 153 and the fourth ground hole 154 are arranged on the second radiation patch 12, and the first ground hole 151 and the third ground hole 153 are symmetrically arranged about the first microstrip line 13 in a first direction, the second ground hole 152 and the fourth ground hole 154 are symmetrically arranged about the first microstrip line 13 in a first direction, through the above arrangement, the matching and the axial ratio of the antenna can be improved, and the antenna unit 100 can work in the best state.

[0036] Please refer to Figure 5The third radiation patch 31 includes a third rectangular radiator 311 and a third trapezoidal radiator 312, the fourth radiation patch 32 includes a fourth rectangular radiator 321 and a fourth trapezoidal radiator 322, the second microstrip line 33 includes a second feed line 331 and a second circular feed patch 332, the third rectangular radiator 311 and the third trapezoidal radiator 312 are connected, the fourth rectangular radiator 321 and the fourth trapezoidal radiator 322 are connected, a specific current distribution is generated, thereby affecting the radiation characteristics of the antenna unit 100, one end of the second feed line 331 and the second circular feed patch 332 are connected, the second feed line 331 is used to transmit a signal to the second radiation patch 12, and the second circular feed patch 332 is used to feed a signal to the second feed line 331, the third trapezoidal radiator 312 and the fourth trapezoidal radiator 322 are symmetrically arranged in the second direction about the second feed line 331, the current distribution can be balanced, the reflection can be reduced, the impedance matching of the antenna unit 100 can be improved, the VSWR can be reduced, and the symmetric structure can ensure that the phase difference of left-handed and right-handed circularly polarized waves is stable, thereby improving the axial ratio bandwidth.

[0037] Please continue to refer to Figure 5 The third radiation patch 31 is further provided with a first metal opening 34, the fourth radiation patch 32 is further provided with a second metal opening 35, and the first metal opening 34 and the second metal opening 35 are symmetrically arranged about the second microstrip line 33, thereby providing a transmission path for the first signal feed point 171 and maintaining the symmetry of the third radiation patch 31.

[0038] In the embodiment of the present application, the third metal layer 50 is further provided with a third metal opening (not shown in the figure) and a fourth metal opening (not shown in the figure), thereby providing a signal transmission path for the first signal feed point 171 and the second signal feed point 172.

[0039] Please continue to refer to Figure 5 The third metal ground assembly 301 includes a sixth ground hole 351, a seventh ground hole 352, an eighth ground hole 353, and a ninth ground hole 354, the sixth ground hole 351 and the seventh ground hole 352 are arranged on the third radiation patch 31, the eighth ground hole 353 and the ninth ground hole 354 are arranged on the fourth radiation patch 32, and the eighth ground hole 353 and the ninth ground hole 354 are symmetrically arranged in the second direction about the second microstrip line 33, the eighth ground hole 353 and the ninth ground hole 354 are symmetrically arranged in the second direction about the second microstrip line 33, thereby improving the axial ratio of the antenna for the signal transmission path of the third radiation patch 31 and the fourth radiation patch 32.

[0040] In the embodiment of the present application, the first feeding hole assembly is symmetrically arranged in the second direction with respect to the second microstrip line 33, and the first microstrip line 13 and the second microstrip line 33 have the same shape and size.

[0041] In the embodiment of the present application, the second metal grounding assembly 201, the fourth metal grounding assembly, and the seventh metal grounding assembly are all a plurality of metal columns, and the plurality of metal columns are uniformly arranged on the first substrate 10, the second substrate 40, and the fourth substrate 80. In the embodiment of the present application, the number of metal columns of the second metal grounding assembly 201 is nine, the number of metal columns of the fourth metal grounding assembly is ten, and the number of metal columns of the seventh metal grounding assembly is five.

[0042] Please refer to Figure 6 The simulation results of the design example are shown in Figure 6-9 . Figure 6 The simulation results of the reflection coefficient are shown in Figure 6 , and it can be known that, for the first port of the antenna unit 100, the bandwidth range with a reflection coefficient less than -10 dB is 8.75 GHz to 15.75 GHz, the center frequency is 12.25 GHz, the passband bandwidth is 7 GHz, and the relative bandwidth is 57.1%; for the second port of the antenna unit 100, the bandwidth range with a reflection coefficient less than -10 dB is 8.82 GHz to 16.0 GHz, the center frequency is 12.41 GHz, the passband bandwidth is 7.18 GHz, and the relative bandwidth is 57.9%. It can be known from the simulation results above that the impedance passband of the antenna unit 100 has a wideband characteristic.

[0043] Figure 7 The simulation results of the axial ratio of the antenna unit 100 are shown in Figure 7 , and it can be known that, for the first port of the antenna unit 100, the bandwidth range with an axial ratio less than 3 is 10.25 GHz to 15.33 GHz, the center frequency is 12.79 GHz, the passband bandwidth is 5.08 GHz, and the relative bandwidth is 39.7%; for the second port of the antenna unit 100, the bandwidth range with an axial ratio less than 3 is 9.21 GHz to 15.57 GHz, the center frequency is 12.39 GHz, the passband bandwidth is 6.36 GHz, and the relative bandwidth is 51.3%. It can be known from the simulation results above that the axial ratio passband of the antenna unit 100 has a wideband characteristic.

[0044] Figure 8 The simulation results of the maximum gain of the antenna unit 100 are shown in Figure 8It can be seen that the average maximum gain in the axial ratio bandwidth of the first port of the antenna unit 100 is 4.2 dBi, and the average maximum gain in the axial ratio bandwidth of the second port of the antenna unit 100 is 3.9 dBi. It can be seen from the simulation results that the antenna unit 100 has the characteristic of high maximum gain.

[0045] Figure 9 is the simulation result of the radiation efficiency of the antenna unit 100, and Figure 9 It can be seen that the average radiation efficiency in the axial ratio bandwidth of the first port of the antenna unit 100 is 77.32%, and the average radiation efficiency in the axial ratio bandwidth of the second port of the antenna unit 100 is 74.01%. It can be seen from the simulation results that the antenna unit 100 has the characteristic of high radiation efficiency.

[0046] The embodiment of the present application provides an antenna unit 100, which comprises a first substrate 10, a first metal layer 20, a second metal layer 30, a second substrate 40, a third metal layer 50, a third substrate 60, a fourth metal layer 70, a fourth substrate 80 and a fifth metal layer 90, and the first substrate 10, the first metal layer 20, the second metal layer 30, the second substrate 40, the third metal layer 50, the third substrate 60, the fourth metal layer 70, the fourth substrate 80 and the fifth metal layer 90 are sequentially stacked from top to bottom, which can realize more accurate impedance matching and phase control of the antenna unit 100, and the phase difference between the two radiation units is realized by the fourth metal layer 70, and a plurality of metal grounding hole assemblies are arranged on the metal layer and the substrate, and the metal grounding hole assemblies are symmetrically arranged, so that the antenna unit 100 can effectively suppress the coupling between different polarization components, thereby realizing a wide axial ratio bandwidth.

[0047] The embodiment of the present application also provides a communication device embodiment, which comprises the above-mentioned antenna unit 100, and the specific structure and functions of the communication device can be referred to the above-mentioned embodiments, which will not be described here.

[0048] The above-mentioned is only the embodiment of the present application, and does not limit the patent range of the present application, and any equivalent structure or equivalent process transformation using the content of the specification and the drawings, or direct or indirect application in other related technical fields, are also included in the patent protection range of the present application.

Claims

1. An antenna element, characterized in that, include: A first metal layer, comprising a first radiating patch, a second radiating patch, a first microstrip line, and a first metal grounding component, wherein a first feed point is provided on the first microstrip line, and the first radiating patch and the second radiating patch are symmetrically arranged about the first microstrip line in a first direction. A first substrate, on which a second metal grounding component and a first power feeding hole component are disposed; The second metal layer includes a third radiating patch, a fourth radiating patch, a second microstrip line, and a third metal grounding component. The second microstrip line has a second feed point. The third radiating patch and the fourth radiating patch are symmetrically arranged about the second microstrip line in a second direction. The second substrate has a fourth metal grounding component and a second power feed hole component disposed thereon. The fourth metal grounding component is symmetrical about the center point of the projection of the first microstrip line and the second microstrip line onto the second substrate. A third metal layer, on which a fifth metal grounding component is provided, the fifth metal grounding via assembly being symmetrical about the center point of the projection of the first microstrip line and the second microstrip line onto the third metal layer; A third substrate, on which a sixth metal grounding component is disposed; A fourth metal layer is connected to the third metal layer, the third substrate, the fourth substrate, the fifth metal layer, the first substrate, the first metal layer, the second substrate, and the second metal layer to form a phase-shifting network, providing broadband signals to the first radiating patch and the third radiating patch to form a wide-axis ratio right-polarized antenna; or, it can provide broadband signals to the second radiating patch and the fourth radiating patch to form a wide-axis ratio left-polarized antenna. The fourth substrate has a seventh metal grounding assembly; three of the metal posts are grounding holes, and two of the metal posts are the third and fourth feed holes. Fifth metal layer; The first metal layer, the first substrate, the second metal layer, the second substrate, the third metal layer, the third substrate, the fourth metal layer, the fourth substrate, and the fifth metal layer are stacked sequentially from top to bottom.

2. The antenna element according to claim 1, characterized in that, The fourth metal layer is provided with a third feed point, a fourth feed point, a fifth feed point, and a sixth feed point; the fifth feed point and the sixth feed point are respectively connected to an external signal source through the third feed hole and the fourth feed hole; the third feed point and the fourth feed point are respectively connected to the first feed point and the second feed point through the first feed hole and the second feed hole, transmitting the signal to the first radiating patch, the second radiating patch, the third radiating patch, and the fourth radiating patch.

3. The antenna element according to claim 1, characterized in that, The third metal layer, the fourth metal layer, and the fifth metal layer are electrically connected through the fifth metal grounding component, the sixth metal grounding component, and the seventh metal grounding component, respectively.

4. The antenna element according to claim 1, characterized in that, The first radiating patch includes a first rectangular radiator and a first trapezoidal radiator, the second radiating patch includes a second rectangular radiator and a second trapezoidal radiator, the first microstrip line includes a first feed line and a first circular feed patch, the first rectangular radiator and the first trapezoidal radiator are connected, the second rectangular radiator and the second trapezoidal radiator are connected, one end of the first feed line is connected to the first circular feed patch, and the first trapezoidal radiator and the second trapezoidal radiator are symmetrically arranged about the first feed line in a first direction.

5. The antenna element according to claim 1, characterized in that, The first metal grounding assembly includes a first grounding hole, a second grounding hole, a third grounding hole, and a fourth grounding hole. The first grounding hole and the second grounding hole are disposed on the first radiating patch, and the third grounding hole and the fourth grounding hole are disposed on the second radiating patch. The first grounding hole and the third grounding hole are symmetrically arranged about the first microstrip line in a first direction, and the second grounding hole and the fourth grounding hole are symmetrically arranged about the first microstrip line in a first direction.

6. The antenna element according to claim 1, characterized in that, The third radiating patch includes a third rectangular radiator and a third trapezoidal radiator, the fourth radiating patch includes a fourth rectangular radiator and a fourth trapezoidal radiator, the second microstrip line includes a second feed line and a second circular feed patch, the third rectangular radiator and the third trapezoidal radiator are connected, the fourth rectangular radiator and the fourth trapezoidal radiator are connected, one end of the second feed line is connected to the second circular feed patch, and the third trapezoidal radiator and the fourth trapezoidal radiator are symmetrically arranged about the second feed line in a second direction.

7. The antenna element according to claim 5, characterized in that, The third metal grounding assembly includes a sixth grounding hole, a seventh grounding hole, an eighth grounding hole, and a ninth grounding hole. The sixth and seventh grounding holes are disposed on the third radiating patch, and the eighth and ninth grounding holes are disposed on the fourth radiating patch. The eighth and ninth grounding holes are symmetrically arranged about the second microstrip line in a second direction.

8. The antenna element according to claim 1, characterized in that, The first feed hole assembly is symmetrically arranged about the second microstrip line in a second direction.

9. The antenna element according to claim 1, characterized in that, The first microstrip line and the second microstrip line have the same shape and size.

10. A communication device, characterized in that, Includes the antenna element as described in any one of claims 1-9.

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